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Definition . JAUNDICE: yellowish discoloration of skin, sclera and mucus membraneResults from accumulation of un conjugated bilirubin pigment in the skin occur in 60% of term infant and 80% of preterm infant.. Bilirubin production . Bilirubin is a product of heme catabolism. Approximately 80 to 90%
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1. NEONATAL JAUNDICE(??????? ???????) ?.???? ???? ????
2. Definition JAUNDICE: yellowish discoloration of skin, sclera and mucus membrane
Results from accumulation of un conjugated bilirubin pigment in the skin occur in 60% of term infant and 80% of preterm infant.
3. Bilirubin production Bilirubin is a product of heme catabolism. Approximately 80 to 90% of bilirubin is produced during the breakdown of hemoglobin from red blood cells (RBCs). Hemoglobin globin +heme co +biliverdine Bilirubin +albumin hepatocyte (glucuronic acid) bilirubin diglucuronides + bilirubin monoglucuronides.+ Conjugated bilirubin Conjugated bilirubin is secreted into the bile, and then excreted into the digestive tract. conjugated bilirubin is reduced to urobilin. Un conjugated bilirubin : lipid soluble can cross blood brain barrier and its neurotoxic. Conjugated bilirubin: water soluble not neurotoxic it indicates serious liver disorder .